Akrapovic Exhaust Sound Kit - B8 Audi | S5 | 4.2LAkrapovic Exhaust Sound Kit 20102015 Audi B8 S5 4. 2L V8 Part #: P HF877 Overview The Akrapovic Exhaust Sound Kit for the B8 Audi S5 with a 4. 2L V8 engine offers enthusiasts the ability to customize their vehicle's exhaust note effortlessly. Designed for drivers who seek a versatile sound profile, this kit allows you to switch between a refined, quiet mode and a more aggressive, sporty sound at the push of a button. Whether you're daily driving or